Grate



(No Model.) L. Ml WOODCOGKI 3 Sheets-Sheet l;

` GRATE. No. 384,409. Patented June 12, 1888.

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`(No Model.) 3 sheets-sheet 2 L. M. WOODCOCK.

.-GRATB.

No. 384,409. 4 Patented June 12, 1888.

. (No Model.) 3 Sheets-Sheet 3.

L. M. WooDGooK.

GRATB.

N0. 384,409.. Patented June l2. 1888.

- Fig. 2 is a side elevation.

NiTEn STATES PATENT ERICE.

LEONARD M. woODcooK, OE AUBURN, NEW YORK.

GRATE.

SPECIFICATION forming part of Letters Patent No. 384,409, dated June 12.1888.

Application filed June 14. 1887.

To all whom, it may concern:

Be it known that I, LEONARD M. WOOD- co'cK, a citizen of the UnitedStates, residing at Auburn, in the county of Cayuga and State of NewYork, have invented certain new and useful Improvements in Grates; and Ido hereby declare the following to be a full, clear, and exactdescription ofthe invention, such as will enable others skilled in theart to which it appertains to make and use the same.`

My invention relates to furnace-grates; and it consists of certainimproved constructions which greatly facilitate the shaking and dumpingof the same.

The following specification and claims, reference being had to theannexed drawings, fully disclose my invention.

In the drawings, Figure 1 is a plan View. y Figs. 3 and 4 are sideelevations of the grate-bars and connecting devices. Figs. 5, 6, 7, and8 are detail views of different parts of my invention. Fig. 9 is asectional view on line yy, Fig. 7, showing the position of the partswhen the gratebars are looked. Fig. l() is a like sectional view, withthe shakerf in position for shaking the grate and holding back the lock.Fig. 11 is a front view of the shaking-lever andloek, the latter beingin position to limit the movement of the grate-bars. Fig. l2 is asimilar View, but with the lock retracted to allow the grate to bedumped.

Similar letters of reference indicate identical parts throughout.

The construction of the frame A and the arrangement of the grate-bars BBis substantially the same as the construction and arrangement of thecorresponding parts in my United States Patent No. 359,120. The frameshown is of rectangular form, andthe gratebars are journaled therein inthe manner shown in said patent. Each grate-bar has adownwardly-depending arm, D, and said arms are connected toaconnecting-bar, D, so that such bars move in unison to shake the gratefor the removalofashes or cinders or for dumping the same.

`To the front of the frame A is secured a bracket, C, provided withopenings a. Firml y secured to this bracket is a casting, C. These partsare similar to the corresponding parts Serial 1510.241266. (No model.)

in my said patent. To the bracket C is pivoted-the arm E, which in itsnormal position lies against the face of the casting C. The lower end ofthis arm is connected byarod, Z), with the connecting-bar D. These partsare also similar to the like parts of my patent hereinbefore referredto.

To the side of the casting C', opposite the arm E, is pivoted the lockc. (Best shown in Fig. 8.) This lock has iianges c c', which cxteud oneither side of the lower portion of the casting G, and also on eitherside ot" the arm E, and the same is brought into a vertical positionagainst the face of the casting, all as shown in my former patent. Inaddition to these locking-flanges, the lock cis provided near its upperend with arms extending outwardly on each side. These arms at theirouter extremities are provided with lugs x x, as shown in the drawings.

The arm E is provided at its lowerend with the lugfand the groovef'l,and the shaker is provided on opposite sides with lugsfs. The arm Eisalso provided with two openings, o of, tO receive the end ofthe shaker.

It will be seen that when the parts are in the normal position, 'asshown in Figs. 3 and 9, the arm E and the grate-bars are locked inposition and are prevented from accidental displacement.

lVhen it is desired to agitate the grate-bars, the shakerfis inserted inone of the openings o o and turned until one ofthe lugs f enters thegroove f2 and engages the lugf, and the other lug ot the shaker raisesthe lock c by bearing against the inner face ot the outer flange,c,until the hanging arm E is released and can be moved back and forth toagitatc the the grate bars. The movement of these bars is limited andthe grate kept from tipping too much by the arm E coming in Contact withthe lugs x Vhen it is desired to tip the grate to dump it, the lock c isretracted until the lugs x x can no longer engage the arm E, but allowit to swing past. This lever E and its support can be located eitherinside of the ash-pit or can be located outside of the same and outsideof the furnace, as preferred. The two openings 0 o are for the purposeof adapting the device to different boiler-fronts.

Instead of the device shown and described,

IOO

I can luse that best seen in Fig. 4. A grate-bar is provided with anextension,F, which I prefer to provide with twosplines, but which may bepolygonal or of any form so as to allow' the sleeve F', which is made tofit it, to have an independent longitudinal movement, but will rotatewith it. rlhe inner face of the sleeve F is shownin Fig. G,a portionbeing cutaway and the remaining edge, y, being slightly rounded.

Rigidly attached to the frame A is the projection G, so located thatwhen the sleeve F is placed upon the extension F and moved close to theframe the lower face of the projection G will be immediately over and iuContact with the upper face of the said sleeve, and these partsbeing'lin this position, it will be seen that the grate-bars cannot bemoved. In order to agitato the gratebarsdhe sleeve F is retracted untilthe projection G is over the rounded or reduced portion g, which issomewhat lower than the upper face of the sleeve. In this position thebar may be turned until the projection G comes in contact with theextremities of the edge g. All of the grate-bars, being connected,areaffected by the movement of one, and are therefore oseillated equallywith the one provided with the extension and sleeve. Vhen it isnecessary to empty the grate, the sleeve is retracted until entirelyfree from the projection G, when the bars maybe readily tipped to anyextent.

Any desirable means may be employed to move the sleeve back and forthupon the extension or to rotate the grate-bar; but I prefer to use ashaker, h, one end of which fits in the opening p of the sleeve andpasses on into an openingin the extension F. The latter opening issmallest at its lower extremity; hence if the shaker is inserted andthen inclined to the position indicated in dotted lilies, Fig. 5, thesleeve is moved out of contact with the projection G, and the grate maythen be shaken. By moving the shaker into a vertical position again thegrate-bars remain fixed.

The grate-bars are the same in form as those shown in my said formerpatent, the lugs of the bars being placed opposite to each other andhaving their opposing faces of arc form. These lugs are of greaterextent horizontally than vertically, and so long as the lugs are opposedto each other the space between them is not increased, and there is nogrinding action on the materials supported by the grate. Vhen it isdesired to dump the grate, the grate-bars are moved so that the ends ofthe adjacent lugs pass each other, forming dumping spaces between thebars. The stops for the shaking devices are so located that the ends ofthe opposing lugs of the bars cannot pass each other. rlhcse stops limitthe movement of the shaking devices, so as to prevent the accidentaldumping of the grate when shaking it to remove ashes, &c. They also, bypreventing the ends from passing each other, prevent any grinding actionupon the coal.

VhatI claim, and desire to secure by Letters Patent, is-

l. The combination, with a supporting frame and oscillating grate-barsconnected for joint movement, of a lock for a movable part connectedwith said bars, the said lock being provided with stops located in thepath of said movable part when unlocked, whereby the movement of saidbars when unlocked is limited, substantially as described.

2. The combination, with a supportingframe and oscillating gratebarsconnected for joint movement, of a lock for a movable part connectedwith said bars, the said lock being provided with stopsloeated in thepath of the movable part when unlocked, said movable partand saidstopsbeing the one movable in relation to the other, whereby themovement of the bars for raking the fire when unlocked is limited andthe limitation removed for dumping the grate, substantially asdescribed.

3. The combination, with a supportingframe and oscillating grate-barsconnected for joint movement, and a lever connected with said grate-barsand moving with them, of a hinged plate provided with stops normally inthe path of said lever, the pivots of said 1ever and plate being atright angles to each other, whereby the movement of the said 1ever andgrate-bars is limited in the operation of raking the fire, and the stopsmade removable by swinging the plate outward to effect the dumping ofthe grate, substantially as described.

4. The combination, with a supportingfraaie and oscillating grate-barshaving opposing narrow lateral projections provided with curved ends,securing a. uniform space between the ends of said projections, the saidbars being connected for joint movement, of stops located in the path ofa movable part connected with said bars and holding said bars fromentirely passing each other, whereby the movement of the grate-bars forraking the fire is limited to such a movement as will preserve theuniform distance between the grate-bars, substantially as described.

5. The combination, with a supportingframe and oscillating grate-barshaving opposing lateral projections provided with curved ends, securinga uniform space between the ends of said projections, said bars beingconnected for joint movement, of a lever connected with said bars andmoving with them, a hinged locking-plate provided with stops normally inthe path of the said lever, but at a short distance from each side ofthe same, whereby the grate-bars are locked, when desired, and themovement of the same for raking the fire is limited to preserve theuniform distance between the gratebars, and the removal of the stopswill permit the projections of the bars to be turned to such a positionas to increase the space between the bars, substantially as described.

6. The combination, with a supporting- IOO frame and oscillatinggrate-bars Connected for actuating-bar is removed, substantially7 as de-1o joint movement, of a lever connected. v With scribed.

seid grate bars and moving with them, a In testimony whereof aix mysignature in hinged platte provided with looking projection s presenceof two Witnesses.

5 and stops and an actuating bar or key with projections for` engagingthe lever and ioek- LEONARD M W OODCOGK' ing projections of the plate,whereby the Vitnesses: movement of the lever and grate-bars :is lim-CEAS. OBRIEN, ited in raking the fire andloeked when the CHARLES E.KERR.

